(Another version from Tuesday was shared another 70,000 times, and a third, Wednesday, another 7,000. And plenty of parody versions have popped upas well, although most seem to share the original's sentiment.)

"Sorry to break it to everyone, but changing your little avatar isn't doing anything to change that," he writes. "Yes, the show of support is heartwarming."

It's nice to see so many people who want their gay friends to be spoiled brides just like all their straight friends, but you're not doing anything. This is just another form of passive activism that isn't advancing the cause. Do you know what would be helpful? Actually picking up a sign, heading down to the Supreme Court, and joining the throngs of protesters.""

And at Policy Mic, Tom Mandel writes that the Red Equal Sign campaign is dumb and "one of the laziest things you can do to support marriage equality."

But gay mag the Advocate called the movement "inspiring," listing a slew of public officials, including several governors, whose profiles went red.

And perhaps the reason the campaign was a success was because social media is a reflection of a significant chunk of the population -- particularly younger people.

While social media sentiment does not necessarily reflect public opinion, polls show gay marriage is gaining significant traction. A CBS poll Tuesday shows a majority of Americans (53 percent) support same-sex marriage -- but among Americans under the age of 30, that number rises to 73 percent.

Same-sex marriage supporters rally in front of the U.S. Supreme Court as the Court hears arguments on same-sex marriage, on March 26, 2013 in Washington, D.C. The Supreme Court is hearing arguments on Califonia's ban on same-sex marriage. UPI/Kevin Dietsch

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